marcus miller jazz bass fretless?

So I've ordered a jazz fretless neck from warmoth, and its at HG Thor now getting the epoxy treatment. My original plan was to put the neck on my 1975 jazz that I rarely play, but now am thinking of just getting rid of that bass.

So, this leaves me with my fretless neck that I need a body for. I recently came across a great deal on a MM bass that is going for cheap because it has a pbass neck on it instead of the original. I'm considering buying it and selling the pbass neck on it and installing my neck. I'm wondering how this bass would sound with my new fretless neck? Anyone here put a fretless neck on a MM before? Any thoughts on this?

I think I have it narrowed down to using my new epoxied fretless neck on this marcus miller jazz or on a complete Geddy body. (or if all else fails I may just get something in the showcase at warmoth and build something from scratch)